Version 4.0
The Bannermen feature has been completely reworked. When enabled, vassals provide 50% fewer levies but are obligated to join their liege when called to war, otherwise they are branded as oathbreakers, a punishable offense.

Added a new decision "Call the Banners" which can be used after a war begins. War participants can call their own banners as well under some circumstances (like a civil war).

Added a new notification "Vassal Breaks Oath" which is dispatched if a vassal refuses a call to arms and their liege has absolute crown authority or if the bannermen obligations feature is enabled.

Decisions to call vassals have been moved into the "Major Decisions" category.

Several adjustments were made to the AI to improve their war declaration logic.

Modified some elements in the vassal participation UI for clarity.

New options for "Levy Size" and "Garrison Size" were added to allow you to reduce levies even further.

Version 3.19
Some small bug fixes in preparation for a new major update.

Version 3.18
AI war stance behaviors have been updated to account for the latest patch.

War declaration UI will now correctly display the total army count for both sides.

Several game rules can now be disabled again.

Version 3.17
Slower MAA Reinforcement Rate is now disabled by default, but it'll apply a 50% reduction instead of 25%. You can enable this again in the interactive_main_defines.txt file.

Vassal Opinion now applies a fellow vassal opinion reduction in addition to the direct vassal opinion reduction, which incentives more internal conflicts.

Players will no longer be given the option to side with populist uprisings.

Version 3.16
Crown Authority - At absolute crown authority, vassals who refuse a call to arms are considered oathbreakers, a punishable offense.

Vassal Opinion - All characters receive a modifier of -10 to -50 vassal opinion, making their realms more instable.

Vassals who join an external war can now be forced to leave if they are captured in battle by the opposing side.

Made some improvements to the War AI priorities so they focus more on battles.

Imprisoned vassals will no longer side with the rebels at the start of a civil war, and will remain neutral instead.

Combat advantage and adventurer limit are now controlled by game rules.

Version 3.15
Oathbreakers - Vassals who hate their liege can attempt to betray them during a war, becoming oathbreakers, a punishable offense.

Vassal Aggression - A liege can ask a vassal to stop one of their offensive wars in exchange for some form of compensation.

Men-at-Arms Reinforcement Rate - Men-at-Arms regiments replenish at a rate of 7.5% per month instead of 10%, which makes casualties more impactful.

Tax Contribution - The percentage of gold that vassals provide to their liege is reduced by a multiplier of 10% to 95%, depending on your game rule setting.

Opinion penalties for going over the duchy limit has been increased from -15 to -20 per duchy, making it harder for a liege to consolidate power over their entire realm.

Rebalanced some lifestyle perks to fit better with the mod balance.
Chivalric Dominance: Knight Effectiveness reduced from +75% to +50%.
Living off the Land: Supply Capacity reduced from +200% to +100%.

Reduced the maximum number of adventurers on the map at a time, greatly improving performance.

Version 3.14
Gave the AI a 25% build cost reduction as part of the Challenging AI game rule, which helps them build higher quality structures.

Several character interactions will no longer display an Influence option if you do not have the administrative government.

Version 3.13
In an administrative realm, vassals can no longer be forced to join a faction using Influence if their opinion of their liege is +25 or above.

This should fix the issue where admin realms have many faction members with negative commitments to the faction and positive opinions of their liege.

Conqueror trait inheritance now defaults to none rather than primary heir only, to reduce AI blobbing.

Version 3.12
Game rules can now be changed mid-save by opening the game rules menu in-game. Some game rules may require reloading the save for the changes to apply.

Fatal Casualties - The number of fatal casualties in combat is increased by a multiplier of 10%, making battles more deadly.

Max Combat Roll - The max combat roll for advantage is increased by 1, adding more uncertainty to battles.

Siege Effectiveness - The siege progress value for siege weapons is increased by 10%, speeding up sieges significantly.

Innovation Speed - The base cultural fascination chance is increased by 10%, allowing for quicker progression through the eras.

Supply Limit - The base supply limit in provinces is increased by 1000, allowing for larger stacks of armies per province.

Supply Duration - The duration of army supplies is increased by 10%, letting armies last longer before resupplying.

Army Speed - The speed of army movement on land is reduced by 10%, making military campaigns more costly and strategic.

Naval Speed - The speed of army movement in water is reduced by 10%, adding further downsides to naval travel.

All previously added game rules have been updated to allow for increments of 10%. For example, Levy Size can now be reduced by 10%/20%/30% instead of 25%/50%/75%.

Version 3.11
Reduced the damage multiplier for each unit of advantage in a battle from 10% (vanilla value) to 5% (modded value) for balance.

Crown Loyalist faction should no longer conflict with the "Support Faction" adventurer contract.